JPH01190454A - Multicolor printing apparatus and positioning device of object to be printed - Google Patents

Abstract

PURPOSE:To perform multicolor printing of an object placed on a rotary table which is rotated every predetermined angles intermittently, by a printing mechanism successively at a fixing part, and to correctly position said object by moving said fixing parts by a fixed position restoring mechanisms in association with a printing cylinder during printing. CONSTITUTION:There are eight fixing parts 3 for placing an object (a) to be printed, which a spaced an equal distance each other in the peripheral direction on the upper surface of a rotary table 1 which is supported by a shaft on a base 2. The rotary table 1 is intermittently and repeatedly rotated and stopped by a prime mover. At this time, the distance of the fixing parts 3 is rendered one pitch. Printing mechanisms 4 are provided respectively above the fixing parts, that is, the first, second, fourth and fifth stop positions from a supply unit A in the rotational direction of the table. Dryers 5 are provided at the third and sixth stop positions. The object (a) is printed each time at the first and second stop positions, thereby to complete printing in two colors. Then, the object (a) is dried at the third stop position. Furthermore, the object (a) is printed each time at the fourth and fifth stop positions, thereby to complete printing in two colors. Thus, printing in four colors is completed. Thereafter, the object (a) is dried at the sixth stop position. The platform 3 of the fixing part is supported by a stopper 16 formed at an end part of a guide element 14 to be kept at the fixed position by a restoring mechanism 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a multicolor printing apparatus for plate-shaped articles and a positioning apparatus for a printed article with respect to the printing apparatus i11.

[Conventional technology]

Various types of multicolor printing devices have been proposed for conventional articles, but the format is that one printing substrate is placed in a straight line on a conveyor, and each color is printed along the linear conveyance path. Another printing mechanism may be arranged and the transferred articles may be sequentially placed opposite these printing mechanisms for printing, or a cylinder having a plurality of colored plates on its circumferential surface may be used and the articles may be brought into contact with this cylinder to form a cough circle. Multicolor printing is generally performed by rotating the cylinder.

[Problem to be solved by the invention]

In the former method using the above-mentioned conventional means, the article is moved in a straight line, so in the case of multiple colors, the amount of article movement is long], and therefore the space occupied by the machine is limited, and in the latter case, the amount of space occupied by the machine is limited. There are problems in that the structure becomes complicated, and in both cases there are many problems in positioning the article with respect to the printing plate (fc).

[Means to solve the problem]

As the next means for solving the above problems, the present invention provides a plurality of print substrate fixing parts on the top surface of the rotary disk at regular intervals along the circumferential direction, and the rotary plate is arranged intermittently with the interval f of the fixed parts being 1 pitch. A printing mechanism is provided above the stationary part at the stop position, and during one rotation of the rotary plate, the printing material that is supplied and held in the stationary part is sequentially rotated facing the printing mechanism and printed. In addition, a plurality of stationary portions for printing substrates are arranged at intervals and facing the printing mechanisms sequentially along the arrangement direction of the printing mechanisms. It consists of a movable base plate, and is provided so that a fixed position restoring mechanism is used to maintain the plate cylinder in the printing mechanism in the proper position for initial printing, and the base plate is moved in synchronization with the start of printing by rotation of the plate cylinder. The printing material held on the base plate is printed while being moved in the direction, and at the end of printing, the base plate is fixed immovably, and the stationary part is moved intermittently Kfl' - the locked base plate is moved to the next position. Before facing the printing mechanism, release the lock of the base plate and position it! (It is characterized by being provided with a locking mechanism that returns the base plate to the proper position for the next printing using a base mechanism.) [Operation] In the present invention, the base plate is provided on a rotary plate that rotates intermittently at a constant angle. Multi-color printing is applied to the stationary printing substrate in one rotation of the rotary wheel through contact with the printing plate width of the printing @ structure provided at the stop position tmlK of the stationary section, and therefore printing substrate feeding and printing removal operations are carried out in an orderly and precise manner along a trajectory of circular motion within a relatively small occupied area.

In addition, the stationary part for the printing material is composed of a movable base plate, which is held in the proper position at the time of initial printing by the printing plate cylinder (by a fixed position restoring mechanism), and is moved in conjunction with the plate cylinder during printing. By moving the base plate, the printing operation is smoothed, and at the end of printing, the base plate is fixedly locked and the stationary part moves intermittently, and the base plate is moved intermittently before the next printing by the printing mechanism. The lock is released and the normal position restoring mechanism is accurately positioned to the proper initial printing position with respect to the plate cylinder for the next printing.

〔Example〕

Embodiments of the device of the present invention will be described with reference to the drawings.

(1) A rotary disk mounted on a Fi base (2), with eight article holding parts (
3)... is provided, and the rotary disk (1) is intermittently rotated in the direction of the arrow in Fig. 1 by a driving device (not shown) with the interval between the stationary parts (3) being one pitch. , the stop is repeated, the stop position of the footrest at the person's position in the figure is the supply part, the third position 111c is the take-out part of the finished article a, and the rotation direction from the supply part is 1.2. A printing mechanism (4) was provided above the stationary section at each of the 4.5 and 5th stop positions, and a drying device (5) was provided at the 3.6th stop position.

At the above f7c position, the stationary part (3
) When the printing material a (hereinafter referred to as article a) is fed to the rotary disk (1) and rotated intermittently, article a is printed at the 1st and 2nd positions when stopped at tilK, resulting in two-color printing. When the drying device (5) is finished, the next IC5 is placed at rest position.
After being dried, two more colors are printed at the stop position 4.5, and after a total of four colors have been printed, the article that has been dried at the stop position 6 is rotated at the heavy position B. It is taken out from the top of the board (1).

In addition, the supply section for the articles a stores a large number of articles a stacked in a magazine (6) in advance, and gradually raises the ram mt-ζ. ) with a lever (which rotates the force to remove the upper article a from inside the magazine (6)
ft- by suction and take it out, and supply it onto the stationary part (3) on the rotary disk (1), and the take-out part B is similarly drawn by the suction member (8) at the tip of the lever (7). The article that has undergone the printing process is taken out from the stationary section (3), transferred onto the delivery belt (9), and transported to the next processing section.

Further, although the illustrated example shows a card-like rectangular plate as the workpiece a, it is of course possible to apply the present invention to a circular object such as a CD sound board.

Each printing mechanism (4) is connected to the printing mechanism (4) through a small bevel gear (6) which is interlocked with a large bevel gear (IQ) provided at the center of the rotary disk (1), and then to the printing mechanism (4) and the plate cylinder o3. It drives
The large bevel gear QQ is configured such that the stationary part (3) holding the article a is stopped opposite the printing mechanism (4) and then driven, and the drying device (5) utilizes an ultraviolet lamp or other heat source device.

Next, the fixing section (3) for the article a will be explained.

The stationary part (3) is constituted by a base plate that is movable tangentially along the arrangement direction of the printing mechanisms (4). In the illustrated example, the core plate (3) is moved along the guide piece a barrel provided on the rotating disk (υ, and the plate (3) is set to a fixed position restoration mechanism).
As shown in Figure 2, the guide piece σ◆ is formed at the end of the guide piece σ◆ and is held in a fixed position supported by a companion stopper (to). The article on the bed plate (3) was placed in the correct position for this initial printing against the printing plate (&)K.

In this embodiment, a traction spring is used as a mechanism (T) for restoring the base plate (3) to its normal position, but the piston action of an air cylinder mechanism may also be used. The case where it is used will be explained.

A rack piece 11'rI of a predetermined length is fixed horizontally to the negative side of the base plate <3), and a partially toothed ring 0 is coaxially with the plate cylinder (2) and has meshing teeth (18a) of the same length as the rack. *1- When the rack piece 11n and the teeth (18a) of the toothless ring (to) are fixed and in the proper holding position for printing of the base plate (3) with respect to the plate cylinder QIK, the rack piece 11n and the teeth (18a) of the toothless ring (to) are separated as shown in the second diagram. From this state, the plate cylinder Q3t rotates in the direction of the arrow, and when the toothless transfer (7) meshes with the rack piece t1n, the plate surface (15a)
Printing starts in contact with side A of the article on the base plate (3), and after that, the base and plate (3) move in the same direction against the spring 4 in conjunction with the rotation of the plate cylinder, and the printing process begins. continues, and after printing is completed as shown in the third figure, the plate cylinder o4 further rotates and the plate surface (13
L) is detached from the object surface A, the tooth width of the toothless ring (G) is also detached from the rack piece U7), and the plate cylinder o3 rotates once to the second position.
In the illustrated state, the printer is stopped at the next printing ready position. On the other hand, the nine plate (3) separated from the plate body opening is the traction spring (7)
However, as shown in Fig. 3, at the time when the missing tooth ring and the rack piece set η are separated, the base plate (3 )
The cover prevents it from returning.

That is, the locking mechanism 4 is pivoted on the rotary disk (1) and is supported by the spring (7).
The locking pawl engages with a concave notch (drive) provided on the negative side of the base plate (3) at a position where it separates from the plate cylinder 0, and the base plate (3) is disengaged from the plate cylinder 0. 33 is prevented from being pulled back] by the spring.

After this locking operation, the plate cylinder rotates once and stops as described above, but after this locking, the base plate (3) is moved to the next printing mechanism by intermittent rotation of the rotary plate. (4), but in preparation for the next printing, it is necessary to release the lock in order to position the table piece (3) in the proper position relative to the plate cylinder (LIK), so the next printing mechanism (4) Before facing each other, move the release piece υ that acts on the locking claw (6) and releases the lock while the base plate (3) is moving from the fixed base (2) toward the movement trajectory of the locking claw (to). As shown by the phantom line in FIG. 4, the locking port collides with the release piece 0, and the locking relationship of the recessed part (5a) of the base plate (3) is released, and the base plate (3) is released. 3) The spring ■ returns it to its original position so that it will be in the proper position for the next printing.

Thus, as shown in FIG.
The article a fed above is printed while facing the first printing mechanism (4) by one rotation of the rotary disk (1), and the base plate (3) is fully moved in conjunction with the rotation of the plate cylinder IEbK. At the end of the process, the base plate (3) is locked in the moving position by the locking mechanism 4,
When the plate cylinder rotates once, it returns to its original state and stops, and then, during one rotation of the rotary plate, the base plate (3) is unlatched and the base plate (3) is rotated.
) is the proper position for the second printing mechanism (4).
), and after printing is finished here, the table piece (
3) is introduced into the drying device (5) with the latch released, and subjected to drying processing, and then 3. After printing is performed by the fourth printing mechanism (4), it is transferred to the drying device (53t- and then to the take-out section B). Then, the four-color printed article ai is taken out from the base plate (3) and transferred onto the delivery belt (9), and the multi-colored article is continuously printed during one rotation of the rotary disk (1). be.

In order to stabilize the article a on the base plate (3), K may adopt other means such as applying negative pressure to the lower surface of the article a on the base plate (3) to suction and hold the article a. , the specific means have been omitted. Also, article holding part (base plate) (3)
The number can be increased or decreased as desired, and the number of drying devices (5) can be increased or decreased as desired.
or their number, arrangement, etc. can be freely set, and
The supply and removal means are not limited to the illustrated example, and other means may be adopted.

Furthermore, the positioning device according to the present invention can also be applied to multicolor printing using a plurality of printing mechanisms arranged in a straight line.

〔Effect of the invention〕

The multicolor printing device 1 according to the present invention transfers an article in a circular motion, and prints the article by sequentially stopping a plurality of printing mechanisms provided along the movement path facing each other, and performs multicolor printing in one rotation of the rotary disk. Therefore, the equipment does not require a large area, and therefore the installation conditions are easy.Also, a movable base plate is used for positioning the printing of the article, and this is locked and released in a timely manner by a locking mechanism. As a result, contact rotation with the plate cylinder and restoration to the proper position after rotation are smooth, and the positioning of the article can be performed accurately even in multicolor printing, which has the following effects.

[Brief explanation of the drawing]

Claims (1)

[Scope of Claims] 1. A plurality of printing substrate stationary parts are provided at equal intervals along the circumferential direction on the upper surface of the rotary disk, and the rotation of the rotary disk is intermittently stopped using the intervals of the stationary parts as a pitch. A printing mechanism is provided above the stationary part at the stop position, and printing is performed by sequentially passing the printing material supplied to the stationary part and held in the stationary part during one rotation of the rotary plate while facing the printing mechanism. Color printing equipment. 2. The stationary part for the printing material is made up of a base plate that is movable along the arrangement direction of the printing mechanisms, and is arranged to face each of the printing mechanisms sequentially along the arrangement direction of the printing mechanisms arranged at intervals. Then, the printing mechanism is provided to be held at the proper position for initial printing with respect to the plate cylinder by a fixed position restoring mechanism, and the base plate is held on the base plate while moving in the same direction in conjunction with the start of printing by rotation of the plate cylinder. The base plate is fixed immovably at the end of printing, and the base plate is fixed before the fixed base plate faces the next printing mechanism due to the intermittent movement of the stationary part. A workpiece positioning device comprising a locking mechanism that releases the lock and returns the base plate to the proper position for the next printing using a home position restoring mechanism.